what size holes and thread...

[69 Valiant Kid]

anyone know on a 340 air gap manifold what size bolt i need for the passanger rear hole running off the back intake runner? and the bolt size to plug the hole on the passenger side front(farthest to the right) also what size pipe i need for the nipple to run to the heater core ....thanks kurt

 

[WildCat]

if the plug behind the right rear carb stud is what you are asking about I believe it is 1/4" pipe plug (may be 3/8 but think it is 1/4")

The 3 holes in the front

driver side 3/8" for heater hose hook up

center 1/4"

passenger side 1/8" for temp sending unit

I'm going off memory and you have to understand I'm getting old and they claim the memory is 1st to go........LOL

make sure you use PIPE PLUGS ONLY, if you force a bolt into these holes you will have some BIG PROBLEMS

 

[69 Valiant Kid]

wildcat, you're good. any idea on that element part number?